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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Spacecraft Avionics

• Avionics overview• Shuttle systems• Constellation systems

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© 2011 David L. Akin - All rights reservedhttp://spacecraft.ssl.umd.edu

Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Avionics Functions

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Shuttle Data Bus Architecture

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Displays and Controls Block Diagram

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Communications Block Diagram

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

On-Orbit Communications Links

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Shuttle Antenna Locations

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

S-Band Network Equipment

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Ku-Band Radar and Communications

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Payload Interfaces

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Shuttle Baseline Systems Architecture

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Shuttle Avionics Installations

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Software Architecture

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Navigation, Guidance, and Control Elements

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Reaction Control System Architecture

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Crew Audio System

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Electrical Power Distribution Bus (1 of 3)

from J. F. Hanaway and R. W. Morehead, Space Shuttle Avionics Systems - NASA SP-504, 1989

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

CEV Avionics Architecture

• Command and Data Handling (C&DH)• Displays and Control (D&C)• Communications and Tracking (C&T)• Instrumentation wiring• Flight software

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

So How Do You Do “Avionics”?• Create specifications

– Sensor list (type, location, number, criticality)– Networking strategy– Estimate of processing throughput

• Complexity of controlling equations• Required cycle times

– Communications bandwidth

• Select critical components– Data management units– Redundancy strategies– Communications frequencies

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Spacecraft AvionicsENAE 483/788D - Principles of Space Systems Design

U N I V E R S I T Y O FMARYLAND

Avionics Design (continued)

• System block diagrams• Interface control documentation• Power and thermal budgets• Crew interfaces (controls and displays)• Failure modes and effects analysis• Probabilistic risk assessment

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